<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <button id="btn">提交</button>

    <script>
        let btn = document.getElementById('btn')
        function handle(e) {
            console.log(e.x, e.y);
            console.log('向后端发请求', this);
        }
        btn.addEventListener('click', throttle(handle, 2000))

        function throttle(fn, wait) {
            let preTime = 0
            return function(...arr) {
                let nowTime = Date.now() // 点击时的时间戳
                if (nowTime - preTime >= wait) {
                    fn.call(this, ...arr)
                    preTime = nowTime
                }
            }
        }
    </script>
</body>
</html>